Brush.



G. U. B

BRU

APPLICATION FILED MAY 17, 1913.

1,082,922. Patented Dec. 30, 1913.

UNITED STATES PATENT OFFICE.

GILBERT C. ."BEMIS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T0 EDWARD F. FLETCHER, OF WORCESTER, MASSACHUSETTS.

BRUSH.

Specification of Letters Iatentl Patented Dec. 30, 1913.

To all whom it may concern Be it known that I, GILBERT 0. Burns, a citizen of the United States, and a resident of the city and county of Worcester and Commonwealth of Massachusetts, have in vented certain new and useful Improvements in Brushes, of Which the following is a full and exact description.

This invention relates primarily to cylindrical brushes employed for cleaning out cannon and the like, but the same general arrangement of parts may be used for the constructionof other types of brushes.

. Referring to drawings forming part of this specification, Figure 1 isa transverse section of a gun-cleaning brush made in accordance with my invention. Fig. 2 is a central longitudinal section of one of the brush units or fillers used in the construction of the brush. Fig. 3 is a similar section of the adjustable socket adapted to receive one of said units. Fig. 4 is a like view of the cap for retaining such unit within said socket. Fig. 5 is an end view of said socket.

When arranged as a gun cleaner, the filler holding member is-a cylinder 1, preferably of wood, having numerous holes 2 bored radially therein for the reception of the sockets 3. The latter consist in each case of a metal tube or shell the inner section 4 of which readily enters one of said holes, and the outer portion of which is externally threaded, as at 5. In the bottom of each of said shells or sockets 3 is a square hole 6 for the insertion of a suitable tool for screwing the threaded section 5 thereof down into one of said holes 2 a sufficient distance to securely fasten the shell therein. Fig. 5 illustrates said hole, which has in addition a second function. Through said hole in each shell, which is made large enough for the purpose, is passed a screw 7 having a contracted neck 9 terminally slotted, and a shoulder 10, the purpose of which is disclosed hereinafter.

Loosely fitting within the outer section of each shell 3 is one of the brush units or fillers 11 consisting of a bunch of wire or other bristles 12 projecting from a thimble 13, as shown in Fig. 2; said wires being. secured therein by crimping or compressing an intermediate portion of the thimble radially inward, to force the wires into the annular groove 14 of the wooden plug 15.

Beneath each thimble 13 and abutting between the under end thereof and the shoulder 10 of a screw 7 isa helical spring 16 acting to force the brush unit or filler outward. The filler is held against the pressure of said spring by the screw cap 17 turning on the threads 5 and provided with a flange 19 engaging the edge of the thimble 13. A check nut 20 secures said screw cap firmly in place. I

As the brush units wear away, said screw cap and check nut of each are turned outward to permit the brush-ends to reach with suflicient pressure the cylindrical surfaces to be cleaned, the degree of pressure being adusted by moving the screws 7 farther out and so increasing the effect of the springs Inasmuchas practically all the cannon are rifled, it is necessary to have the fillers or brush units 11 capable of resiliently yielding in order that they shall enter and sweep the rifle-grooves. To this end, the thimbles 13, and consequently the wires carried thereby, are permitted to radially shift their positions, said springs pressing the bristles outward into proper engagement with the riflegrooves, and then yielding to permit the bristles to pass freely over the sections of the bore of lesser diameters.

By forming a shoulder 22 within the socket 3, a stop is provided for limiting the inward yield of the brush units under the stress of unusual pressure.

The depth inward to which the socket 3 is screwed may be varied by introducing Within the hole 2 one or more washers 21, so that whenever said sockets are removed for any purpose they can be screwed back into contact wit-h the washers, and so the same depth of inward adjustment maintained.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit 1. The combination with a socket, of a brush unit comprising a thimble slidable Within said socket and bristles held by said thimble, a helical spring Within said socket pressing said brush unit outwardly, and a member adjustably carried by said socket and having a flange engaging the outer end of said thimble.

2. The combination with a slightly yielding memberhaving a hole therein, of. a'sockethaving its inner portion loosely fitting said a thimble loose within said socket and bristles held by said thimble, a spring acting to ress said brush unit outwardly, and a col ar threaded to turn on said threaded port-ion of the socket, said collar having an inwardly extending flange engaging the outer end of said thimble to confine the latter within the socket.

3. The combination with a member composed of slightly yielding material and having a cylindrical hole therein, of a socket having its inner portion loosely fitting said hole and its outer portion slightly larger in diameter and threaded, a brush unit comprising a thimble slidable within said socketand bristles held by the thimble, a spring within the socket pressing the thimble outwardly, an internall threaded collar turning on the threaded portion of the socket and having a flange engaging the outer end of the thimble, and a check nut on said threaded portion of the socket.

4. The combination with a member having a hole, of a socket adjustably secured in said hole, of a brush unit comprising a thimble slidable in said socket and bristles held by the thimble, a shouldered screw turning in said member and projectingw-ithin the socket, a helical spring abutting between said shoulder and thimble, and means keeping the latter from emerging from the socket.

5. The combination with a member composed of slightly yielding material and having a cylindrical hole therein, of a socket having its inner portion loosely fitting said hole and its outer portion slightly larger in diameter and threaded, a brush unit carried within said socket, and washersifilling the space between the bottomof said hole and the end of said socket.

6. The combination with a member composed of slightly yielding material and having a cylindrical hole therein, of a socket having threaded outer surface adapted to be forced into engagement with the surface of said hole, the inner end of the socket being partially inclosed to form a polygonal opening for the reception of a tool for forcibly turning the socket-,and a brush unit carried in said socket.

7 The combination with a member having a cylindrical hole, of a socket secured within said hole, a brush unit having a thimble loosely received in said socket, means for preventing the escape of said thimble from said socket, and a spring for pressing said thimble outwardly, said socket being formed with an internal shoulder to serve as a stop for limiting the inward yielding of the brush unit.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 14th day of May, 1913.

GILBERT G. BEMIS.

Witnesses:

A. B. UPHAM, EDWIN SHIvELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

